Burner structure



Mania 3%, "W41; c. AHERMAN 2,235,635

BURNER STRUCTURE Filed July 24', 1939 in LfBS I NV EN TOR.

CLARENCE A.HERMAN ATTORNEYS Patented Mar. 18, 1941 UNITED" STATES PATENTOFFICE BURNER STRUCTURE Clarence A. Herman, Grosse Pointe Farms, Mich,assignor to Detroit-Michigan Stove Company, Detroit, Mich., acorporation of Michigan Application July 24, 1939, Serial No. 286,256

Claims.

ignited gas from flashing or working back into the head and mixingchamber of the burner, there maybe serious consequences, and if theover-all number of such ports is not sufllcient-to provide the properflame, the burner is inemcient. Ordinarily it is quite difflcult andexpensive to drill the required number 0! ports of the proper size,therefore I have designed a burner structure to overcome suchdifliculties.

One of the essential objects of the present invention is to provide aburner wherein the gas ports are formed by superposed stampings and thelike that can be accurately made and assembled to produce the desiredresults.

Another object is to provide a burner structure that is easier and lessexpensive to make than the drilled type of burner mentioned above.

Another object is to provide a burner wherein the over-all number ofports may be increased or decreased according to the number ofsuperposed parts employed.

Another object is to provide a burner wherein the gas entrance end ofeach port is smaller than the exit end thereof so that the flow of gasthrough the port will be such as to cause the ignited gas to burn closeto the exit end of each port instead of being blown away or outwardlytherefrom.

Another object is to provide a burner wherein it is possible for moreprimary air to be used in the mixing tube of the burner so that lesssecondary air is required at the 'exit'end of each gas port to providethe proper combustion.

Another object is toprovide a burner structure that is easier to cleanand service and wherein replacement of parts may be readily andaccurately accomplished whenever desired.

Another object is to provide a burner wherein the top part of thesuperposed members mentioned may be of suflicient area to serve as acooking plate.

Another object is to provide a burner with such a. cooking plate thateffectively conceals and c5 prevents the time from being extinguished byspilling foods, and prevents the letter from entering or clogging thegas ports of the burner.

Other objects, advantages and novel details of construction of thisinvention will be made more apparent as this description proceeds,especially when considered in connection with the accompanying drawing,wherein:

Figure 1 is a side elevation, withparts broken away and in section. of aburner structure embodying my invention;

Figure 2 is a fragmentary top plan view of the from the head thereof:

Figure 3 is a detail plan view of the uppermost part of said superposedmembers;

Figure 4 is a detail plan view of one of the corrugated parts of saidsuperposed members;

Figure 5 is a detail plan view of one of the intermediate parts of saidsuperposed members;

- Figure 6 is an enlarged fragmentary plan view of one of the corrugatedparts;

Figure 7 is a sectional view taken on the line 1-1 of Figure 6;

Figure 8 is a plan view of the assembled superposed members fanned outfor cleaning purposes;

Figure 9 is a fragmentary vertical sectional view through a slightmodification.

Referring now to the drawing, A is the mixing chamber, and B is the headof a gas burner embodying my invention.

As shown, the head B and mixing chambenA are integral and are preferablyformed as a single casting. As usual, the mixing chamber A is tubular inform and is provided at its free end with an enlarged mouth portion 10provided with a gas supply pipe II and a shutter I2 by means of whichthe amount of primary air passing into the chamber A may be readilycontrolled. I

The head B is likewise tubular in form and extends substantiallyvertically from the mixing chamber A. The upper end of this head is openand carries a. number of superposed stampings,

which provide the ports for gas. As shown, the stampings C and D,respectively, are identical in construction. Each comprises a ring I3having radially extending corrugations i4 and having a diametricallyextending attaching bar IS. The stamping E intermediate the stamping s Cand D is a plain flat ring l6 having a diametrically-extending attachingbar 11. The uppermost stamping F is a flat disk. In Figures 1 to 8,inclusive, the area of each stamping C, D, E and F is the same and issubstantially equal to the outside area of the open upper end of thehead B. As shown,

the stamping D'is lowermost and has its corrugaf burner with thesuperposed members removedtions l4 resting on the upper end l8 of thehead The stamping E rests upon the corrugations H of the stamping D. Thecorrugations H of the stamping C rest on the stamping E, and the flatdisk F rests upon the corrugations i 4 of the stamping C. Thus, foursets I9, 20, 2| and 22, respectively, of ports for gas are formed by thesuperposed parts illustrated, the lowermost set l9 being formed by thecorrugations ll of the stamping D and the upper end I! of the head, theset 20 by the corrugations ll of the stamping D and the stamping E, theset 2| by the stamping E and the corrugations H of the stamping C, andthe set 22 by the corrugations ll of the stamping C and the disk F.

By varying the number of stampings in the assembly, the over-all numberof sets of ports may be varied accordingly. For example, if only twosets of ports are, desired, the stampings C and E would be dispensedwith so that the disk F could rest upon the corrugations H of thestamping D. If six or more sets are desired, additional stampings suchas C and E are interposed between the disk F and the upper stamping C. i

In the present instance, each set of ports is substantially the same incontour and cross section and each port has an entrance end whichreceives gas from the interior of the head B and has an exit end 3|where gas is discharged to be ignited. Actually the entrance end 30 ofeach port is smaller than the exit end 3| thereof, and the side walls 32and 33 of each of said ports are gradually flared from the entrance end30 to the exit end 3| so that the how of gas through each port will besuch as to cause the ignited gas 7 to burn close tothe exit end 3| ofeach port instead of being blown away or outwardly therefrom. The crosssectional area of each port is such as to preclude the ignited gasflashing or working back into the head B, yet the over-all number ofsuch ports is such that a proper flame is assured. .Especially is thisso when both the number of sets of ports and the shutter 12 for primaryair can be so easily controlled. In fact, my construction is such thatmore primary and less secondary air may be used to provide the propercombustion.

For anchoring the stampings in place relative to the head, I haveprovided a crossbar 40 within and fixed to the head adjacent the upperend thereof and a screw II that engages aligned openings 42, 43, 44 and45, respectively, in the stamplngs and threadedly engages the crossbar40.

To permit the parts to be cleaned while maintaining their assembledrelation, I have provided a hollow rivet 45 that extends through alignedopenings 41, 48, 49 and 50, respectively, in the stampings and swivellyconnects the same together. Thus, when it is desired to clean thestructure, the screw 4! is removediiomthecrosm bar 40 and stampings C,D, E and F so that the latter as a sub-assembly may be bodily removedfrom the head The individual stampings may then be swung around thehollow rivet 46 as illustrated in Figure8 so that they will beaccessible for cleaning purposes.

In Figure 9 I have illustrated a slight modification'in which the toppart F of the superposed members is of suflicient area to serve as acooking plate. As shown, this plate F is thicker and larger in diameterthan the disk F and extends over and beyond the burner opening 60 in thetop frame H of the gas range. The plate F be a casting and is anchoredby a screw H to may the crossbar 40 of the burner. To permit theproducts of combustion to escape from under the plate F, there are aplurality of legs 63 on the underside of the plate F and resting on thetop frame SI of the range. Thus, these legs 63 space the plate F asuflicient distance above the top frame 6| to provide vents $4 for theproducts of combustion and transmit the load from-the plate F to the topframe 6| instead of to the burner head B. i

What I claim as my invention is:

1. A burner having an upright tubular head open at its upper end, anassembly of superposed stampings on the open upper end of the head andproviding radially extending passages for a combustible mixture, apermanent swivel connection between the stampings of the assemblymaintaining their relative superposed relation but permitting relativelateral movement therebetween for cleaning purposes, and a separatedetachable con. nection between said assembly and said head nor mallyholding said stampings against the lateral movement aforesaid.

2. In a burner, an assembly of superposed plate-like members. adaptedto' be mounted on a and providing radially extend supporting head ingpassages for a combustible mixture, a permanent swivel connection,between the plate-like members of the assembly maintaining theirrelative superposed relation but permitting relative lateral movementtherebetween for cleaning purposes, and means for detachably connectingsaid assembly to the supporting head and normally holding saidplate-likemembers against the lateral movement aforesaid.

3. A burner having an upright tubular head open at its upper end, anassembly 01' superposed stampings on the open upper end of the head andproviding radially extending passages for a combustible mixture,removable means carried by the head for holding the plate-like membersin position relative to the head, .and a connection between saidplate-like members operable when the means aforesaid is removedv to holdthe platelike members together while permitting relative lateraladjustment thereof for cleaning purposes.

4. A burner having an upright tubular head open at its upper end, aradially corrugated ring resting upon the open upper end of said headand cooperating therewith to provide radially extending passages for acombustible mixture, 2. flat rin resting on the corrugated ring andcooperating therewith to provide radial passages for a combustiblemixture, a radially corrugated ring resting on the fiat ring andcooperating therewith to provide radially extending passages for acombustible mixture, and a fiat top plate resting on the last mentionedcorrugated ring and cooperating therewith to provide radial passages fora combustible mixture, removable means carried by the head for holdingthe rings and top plate in position relative to the head, and a.connection between said rings and top plate operable when the meansaforesaid is removed to hold said parts together while permittingrelative lateral adjustment thereof for cleaning purposes.

5. A burner having an upright tubular head open at its upper end, aradially corrugated ring resting upon the open upper end of said headand cooperating therewith to provide radially extending passages for acombustible mixture, aflat ring resting on the corrugated ring andcooperating therewith to provide radial passages for a combustiblemixture, a radially corrugated ring resting on the flat ring andcooperating therewith to provide radially extending passages for acombustible mixture, and a flat top plate resting on the last mentionedcorrugated ring and cooperating therewith to provide radial passages fora combustible mixture, the rings having diametrically extending bars,the top plate and bars just mentioned having two sets oi. registeringopenings, a removable securing element carried by the head engaging oneset of openings and normally holding said rings and top plate inposition relative to the head, and a rivet engaging the other set ofopenings and operable when the securing element is removed to hold therings and top plate together while permitting relative lateraladjustment thereof for cleaning purposes. CLARENCE A. HERMAN.

